电石渣制备高温型硅酸钙防火材料  

High-temperature resistance calcium silicate fireproof material prepared by carbide slag

作　　者：陈烜[1] 李静[1] 刘飞[1] 袁铭鸿[1] 祝博[1] 曹建新[1] 

机构地区：[1]贵州大学化学与化工学院,贵州贵阳550003

出　　处：《贵州化工》2010年第1期1-4,27,共5页Guizhou Chemical Industry

基　　金：贵州省科学技术基金项目(编号:黔科合J字[2009]2052);国家大学生创新性实验计划项目(编号:2008-014);贵州大学大学生创新性实验计划项目(编号:2008-153);贵州大学大学生SRT项目(编号:2009-103)

摘　　要：采用超声技术对电石渣进行预处理改性,控制适宜的超声改性和水热合成工艺参数,制备出了以电石渣为钙质原料的HT-CSF材料。采用XRD、SEM和DSC/TG分析了电石渣改性后合成HT-CSF材料的晶相组成、微观形貌和耐温性,结果表明,超声时间对电石渣乳液活性及HT-CSF材料的耐火极限有较大的影响;水热合成和压滤成型工艺参数对HT-CSF材料的密度及耐火极限也有较大的影响。控制超声时间3h、水热合成工艺参数215℃保温8h、成型压力0.71MPa,可制备出密度140 kg.m-3,抗折强度0.20MPa,1000℃下线性收缩1%,导热系数0.043 W.(m.K)-1,最高使用温度1000℃,耐火极限2h,燃烧等级为不燃性A级的高温型硅酸钙防火材料。In this paper, carbide slag was modified by the pretreatment of ultrasonic technology. Proper techno- logic parameters of ultrasonic technology and hydrothermal synthesis were controlled to prepare HT - CSF materials with the calcareous material of carbide slag. The crystal phase composition, the microstructure, and temperature re- sistance were analyzed by the methods of XRD, SEM and DSC/TG. The results indicated that the ultrasonic time had great influence on activity of carbide slag emulsion and fire resistance of HT - CSF material. And the technolog- ic parameters of hydrothermal synthesis and pressure filtration had great influence on the density and fire resistance of HT - CSF material as well. The high - temperature calcium silicate fireproof materials with density of 140 Kg · m-3, flexural strength of 0.20MPa, linear shrinkage of 1% at 1000℃, thermal conductivity of 0. 043 W · （m · K-1 ）, the highest available temperature of 1000℃, fire resistance of 2b, and burning rank of incombustibility A class could be prepared by controlling ultrasonic time at 3h, technologic parameters of hydrothermal synthesis at 215℃ holding 8h, and the molding pressure at 0.71MPa.

关 键 词：电石渣 超声技术 硅酸钙耐高温防火材料 

分 类 号：TQ17[化学工程—硅酸盐工业]